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Scientific Timeline
Published by Universitas Nahdlatul Ulama Purwokerto
ISSN : -     EISSN : 27763935     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Scientific Timeline is focusing on the field of science and technologies that are studied in Universitas Nahdlatul Ulama Purwokerto. Agriculture, Farm, Fisheries and basic sciences of Maths and Biology are some of them with addition of Food Technology and Agricultural Biosystem Engineering. This journal is scoping articles from reports of analysis, studies, research, to application of theories, material development, and also some reviews.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Perairan
Articles 5 Documents
 1 
Search results for , issue "Vol. 1 No. 2 (2021)" : 5 Documents clear
Struktur Komunitas Mikrofita Sungai Pelus Kabupaten Banyumas Kaitannya dengan Kandungan Nutrien (Nitrat, Orthofosfat dan Silika) Nur Laila Rahayu; Agatha Sih Piranti; Carmudi
Scientific Timeline Vol. 1 No. 2 (2021)
Publisher : UNU Purwokerto

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Abstract

The increase in nutrients (nitrate, orthophosphate, and silica) will affect the microphytes as primary producers in the Pelus River ecosystem. This research aims to study NO3, PO4, Si(OH)4 concentration, the community structure of planktonic and benthic microphytes, and also the correlation between NO3, PO4, Si(OH)4 concentration with the benthic microphytes abundance in the Pelus River. The method used for this research was a survey method. Data were analyzed by calculating the community structure of planktonic and benthic microphytes, while quantitative analysis used indexes. The correlation between nitrate, orthophosphate, and silica concentrations was analyzed by multiple regression. The results showed that the composition of planktonic microphytes consisted of 34 species with an abundance of 41,637 ind.l-1, while benthic microphytes consisted of 54 species with an abundance of 89,908 ind.cm-2. The benthic microphytes community had moderate diversity (H'=1.50-2.58) and no dominant species (C=0.11-0.35). Individuals between species were not evenly distributed in each station (E=0.40-0.44). The correlation between nitrate, orthophosphate, silica concentration with the benthic microphytes abundance was very tight (r=0.999). The determination coefficient R2=0.998 indicated that the benthic microphytes abundance was influenced 99.8% by nutrient concentration. The remaining 0,2% was influenced by other factors such as current velocity and light penetration.
Sifat Fisikokimia dan Sensori Mie Basah dengan Substitusi Tepung Ubi Jalar Ungu Desy Triastuti
Scientific Timeline Vol. 1 No. 2 (2021)
Publisher : UNU Purwokerto

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Purple sweet potato is nutritional food containing high anthocyanin, fiber, and low glycemic index. Wet noodles in which substitution with purple sweet potato flour could be a healthy food choice. The physicochemical and sensory properties of wet noodles with purple sweet potato flour substitution were investigated. This study was conducted using a Completely Randomized Design (CRD) single factor with 3 substitution treatments for purple sweet potato flour to wheat flour (0%, 20%, and 40%). The parameters analyzed included physicochemical properties (moisture, ash, carbohydrates, protein, fat, and anthocyanin content) and sensory properties of wet noodles. Data analysis uses ANOVA, and it was followed by DMRT test if there was a significant difference (α = 0.05). The results showed that the substitution of sweet potato flour had a significant effect on the water, ash, protein, carbohydrate, and anthocyanin content. The highest anthocyanin levels were shown in the 40% treatment. Sensory test results showed that the proportion of purple sweet potato flour in wet noodles had a significant effect on texture, aroma, and preference for color, yet no significant effect on the taste preference. The substitution of up to 40% still produced good wet noodles and meet the quality requirement of SNI.
Sebaran Partikel Tersuspensi, Partikel Terlarut dan Laju Sedimentasi di Teluk Kelabat Luar, Area Pengaruh Penambangan Timah Indra Ambalika; Umroh; Mohammad Agung Nugraha; Aditya Pamungkas; Eva Utami; Irma Akhrianti; Mualimah Hudatwi; Suci Puspita Sari; Titin Marfuah
Scientific Timeline Vol. 1 No. 2 (2021)
Publisher : UNU Purwokerto

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Water turbidity will impact how far the level of distribution of suspended and dissolved particles will affect the life of marine biota. This study aimed to determine the distribution of suspended and dissolved particles in the waters of Teluk Kelabat Luar. Water sampling was carried out in July 2019, representing the east monsoon. Determination of the water sampling location was by purposive sampling method, and then the data were analyzed descriptively. The results showed that the concentration of total suspended solids (TSS) on the surface (1 m) of Teluk Kelabat Luar has the highest concentration at point 4 (KL 4) with TSS concentrations in the range of 36,5 mg/L and point 14 (KL 14) in the range of 34,0 mg/L. Point 4 was the post-tin mining location. From this, it could be seen that the waters are still affected even after mining activities, namely the high concentration of TSS. The analysis of total dissolved solids (TDS) showed the highest concentration at point 12 (KL 12). The sedimentation rate in Teluk Kelabat Luar is in the medium-severe category, which is around 1,92 mL/hour. The results showed that mining had a tremendous effect on the level of suspended particles in the waters.
Pengaruh Penambahan Jenis Buah (Naga Merah (Hylocereus polyrhizus l.), Pisang Ambon (Musa paradisiaca), Stroberi (Fragaria ananassa)) dan Persentase Penambahannya Terhadap pH, Total Asam dan Viskositas Yogurt Harnowo Sidhi; Siti Rahmawati Zulaikhah
Scientific Timeline Vol. 1 No. 2 (2021)
Publisher : UNU Purwokerto

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Abstract

The study aimed to determine the effect of fruit addition, the percentage of addition, and the interaction between the two treatments on variable pH, total acid, and yogurt viscosity produced. The research material is fresh cow's milk from BBPTU Baturraden, conventional yogurt from online stores, red dragon fruit, ambon bananas, and strawberries from traditional markets. This study used a Completely Randomized Block Design (CRBD) factorial, repeated three times. The first factor is the type of fruit (red dragon, ambon banana and strawberry), the second factor is the percentage of juice addition (K1 = 0%, K2 = 2%, K3 = 4% and K4 = 6%(v/v)). The study results concluded that the type of fruit did not affect the pH, total acid, and viscosity of the produced yogurt. In contrast, the percentage of addition of cider affected the total acid and viscosity of yogurt. The higher the percentage of addition of juice, the lower the total acid and viscosity. The interaction of fruit type treatment and the percentage of addition of juice affects the viscosity of yogurt. The lowest viscosity of yogurt produced in strawberry types with an increase of 6% produces a viscosity of 271.60 mPa.s.
Perencanaan dan Pengendalian Proyek dengan Metode CPM (Critical Path Method) di PT Ghani Sejahtera Abadi Nur'aini Muhassanah; Ikhsani Annisa Khozinati
Scientific Timeline Vol. 1 No. 2 (2021)
Publisher : UNU Purwokerto

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Abstract

The purpose of this study is to apply the CPM (Critical Path Method) method to predict and optimize the project's total duration on the scheduling of house construction projects by PT Ghani Sejahtera Abadi. In this research, the method used is quantitative with a descriptive approach. The subjects of this research are project owners and workers who build houses in Kedungrandu Regency Housing. Sources of data needed to meet the criteria for data that CPM can analyze include: (a) data on the name of the activities in the project, (b) the sequence of activities on the project, and (c) data at the time used in the house construction project. For data collection in this study using several techniques, namely interviews and literature study. Based on the results and discussion of this research, the following conclusions are obtained: (1) Critical Path Method (CPM) can be used to schedule optimal, fast, and efficient house construction projects. (2) The CPM application causes the completion time of the type 33 house construction project in the Kedungrandu Regency Housing, which was initially scheduled for 64 days to be faster, namely 42 days.

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